Rapid measurement of 210Po in seafood with large area grid ionization chamber α spectrometry
10.3760/cma.j.issn.0254-5098.2015.05.013
- VernacularTitle:Rapid measurement of 210Po in seafood with large area grid ionization chamber α spectrometry
- Author:
Yucheng LI
;
Liangliang YIN
;
Fei CHEN
;
Xianzhang SHAO
;
Baoming SHEN
;
Xiangyin KONG
;
Yanqin JI
- Publication Type:Journal Article
- Keywords:
Large-area grid ionization chambers;
α spectrometry;
Polonium-210;
Seafood
- From:
Chinese Journal of Radiological Medicine and Protection
2015;35(5):367-370
- CountryChina
- Language:Chinese
-
Abstract:
Objective To develop a rapid and reliable method for determination of 210Po using large-area grid ionization chamber α spectrometry.Methods Samples were digested using a microwave digestion system.After preparation of sample source,the concentration of 210Po in clam was detected by large-area grid ionization chamber (φ 25 cm).209Po tracer was used to obtain the recovery.Results Large-area grid ionization chamber could achieve better counting and α spectrum resolution when the optimized thickness was 250 μg/cm2.By spiking 209Po tracer in clam,the minimum detectable activity was 9.870 × 10 4 Bq and the recovery of 210Po was 98％.Conclusions Compared with the traditional method,the developed method can avoid separation process,using less quantity of sample (0.2-0.5 g dry) and simplify the measurement process.This method may be has broad application prospects.
